Mew avistak



(No Model.)

B. WISTAR a; M. PETTET. GAR STARTER.

No. 403,167.. Patented May14, 1889'.

Fig.1.

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UNITED STATES PATENT ()FFICE.

BARTHOLOMEIV VISTAR AND MILES .PETTET, OF -WELLINGTON, ONTARIO,

' CANADA.

CAR-STARTER.

SPECIFICATION forming part of Letters Patent No. 403,167, dated May 14,1889.

Applicatfoa filed March 11, 1889.

To all whom it may concern:

Be it known that we, BARTHoLoMEW Wis- TAR and MILEs PETTET, the saidBARTHoLo- MEW \VIsTAR, a citizen of the United States of America,residing at the village of \Vellington, in the county of Prince Edwardand Province of Ontario, Canada, and the said MILES PETTET being acitizen of Canada, residing at WVellington aforesaid, have inventedcertain new and useful Improvements in Street- Car Starters; and we dodeclare the following to bea full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and I 5 use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

Figure l is a top view of our car-starter in position. Fig. 2 is aloiigitudinal section of the drum, shaft, and ratchet-wheel. Fig. Sis

a cross vertical section of the same on line y g of Fig. 2. v

Our invention relates to street-car starters; 2 5 and it consists of thecombination and arrangement of the devices, as hereinafter shown anddescribed, in which identical letters represent identical parts.

In the annexed drawings, A represents the 0 portion of the frame of astreet-car with our invention in place.

B is a loose drum upon axle O of a car. D is a ratchet-wheel keyed andsecured to the axle C.

3 5 E is a gravity-pawl secured to the inner side of the drum B.

F is a counter-balance secured within the drum B by bolts and located onthe side opposite to the pawl E.

G G is a chain or line attached to the drum B at the point g, andextending thence rearward to the beam I and forward around the peripheryof said drum to and through the tube K in the cross-beams ac of the car-5 frame A.

K is a tube through the cross-beams a a, through which the chain G runsto the ring L, to which ring the motive powerhorses or mules-isattached.

L is a removable section of the drum.

Z Z are oil-boxes attached to the drum.

Serial No. 302,783. (No model.)

m m are keys inserted in the key-seat in the axle C to secure theratchet-wheel rigidly to the axle. The ratchet-wheel D is made in twosections, as shown in Fig. 3, and is firmly keyed to the axle, as shown,the opposite sections being secured to each other by the bolts 12.,running through overlapping flanges. The drum B, as shown in Fig. 3, hasa movable section, L, extending from the axle to the periphery of thedrum and across its face, by means of which it (the drum) may be placedin position upon the axle after the ratchetwheel has been secured asshown, and the movable section can then be fixed in place in dovetailedgrooves or by flanges and bolted to the main portion of the drum withoutremoving the wheels or axles from their positions and said movablesection is further held in position by the counter-balance F, whichoverlaps both sections of the drum and is secured by bolts.

The mode in which our invention operates is thus: When the car is atrest, the weighted side of the drum is in position, as shown in 7 5 Fig.3, with the gravity-pawlE engaged with the ratchet D. When the horsesstart, the chain G will draw the drum B round in'thc direction of thearrow, Fig. 3, and the pawl E, engaging the ratchet will move the axleand wheels; but when the drum revolves to such position that the pawldrops by gravity and releases the ratchet, the chain G G becomes a rigidconnection between the points of its attachment to the beam I and themotive power in front of cross-beam a, and the draft is then transferredfrom said drum to the beam I. The weighted side of the drum, causing areverse motion thereof thus aids in releasing the pawl. This leverage ofhalf the 0 diameter of the drum gives a manifest increase of power overthe direct draft from the platform of the car. Experiment by an ordinarymechanic will determine the necessary length of the chain G between itsattachment to the beam I and the pointy, at which it is secured to thedrum B, to enable the pawl E to drop out of engagement with the ratchet.The momentum of the car when the horses stop will also carry it a littleforward, and thus aid in affording slack to the chain G and contributeto the reverse motion of the drum. \Vhen the draft is changed to theother end of the car, a similar arrangement willprodnce the sameeilfect. The drum B and ratchet-wheel II) are preferably made in twosymmetrical halves, of metal, cast or boiler iron, as in Fig. 3; or thedrum may he in unequal sections, as in dotted lines along 11 1 Fig. 2,and the shoulders of the ratchetwheel will operate to keep the drum fromsliding laterally on the car-axle.

Having described our invention, what we claim, and desire to secure byLetters Patent, is

In a car-starter, the combination of the Weighted loose drum 1 providedwith mov- I 5 able section L and pawl E, ratchet-Wheel I), provided withkeysm m, and chain G G with car-axle 0, all constructed and arranged asand for the purpose shown and described.

In testimony whereof We affix our sign atn res 20 in presence of twoWitnesses.

BART] IOLOME \VIS'IAR. HILES IETTET. \Vitnesses:

Geo. 0. AL'coRN, 11'. M. LAAC.

